Add OpenCan tool

SConstruct.py

@@ -39,6 +39,7 @@
         'default',
         'Component',
         'EspIdf',
+        'OpenCan',
         'Phony',
     ],
 )

can/SConscript.py

@@ -3,20 +3,8 @@
 Import('env')
 
 
-dbc = env.File('network.dbc')
 network = env.File('network.yml')
-
-dbc_emmitter = env.Command(
-    'create-dbc.py',
-    network,
-    [
-        'opencan-cli compose $SOURCE --dump-python > $TARGET',
-        # what a crime
-        f'sed -i -e s%opencan\\.dbc%{dbc.path}%g $TARGET',
-    ],
-)
-
-dbc = env.Command(dbc, dbc_emmitter, 'python $SOURCE')
+dbc = env.OpenCanDbc(network)
 env.Alias('dbc', dbc)
 
 

site_scons/site_tools/OpenCan.py

@@ -0,0 +1,57 @@
+import os
+
+
+OUTPUTS = [
+    f'opencan_{file}'
+    for file in [
+        'callbacks.h',
+        'rx.c',
+        'rx.h',
+        'templates.h',
+        'tx.c',
+        'tx.h',
+    ]
+]
+
+
+def OpenCan(env, network, node, *, GEN_DIR=None):
+    if GEN_DIR is None:
+        GEN_DIR = env.Dir('opencan-codegen')
+
+    out = env.Command(
+        [f'{GEN_DIR.path}/{output}' for output in OUTPUTS],
+        network,
+        f'opencan-cli codegen {network.path} {GEN_DIR.path} {node}',
+    )
+
+    return out
+
+
+def OpenCanDbc(env, network):
+    dbc = env.File(os.path.splitext(network.path)[0] + '.dbc')
+
+    dbc_emmitter = env.Command(
+        'dbc-emmitter.py',
+        network,
+        [
+            'opencan-cli compose $SOURCE --dump-python > $TARGET',
+            # what a crime
+            f'sed -i -e s%opencan\\.dbc%{dbc.path}%g $TARGET',
+        ],
+    )
+
+    dbc = env.Command(dbc, dbc_emmitter, 'python $SOURCE')
+
+    return dbc
+
+
+def generate(env):
+    if env.Detect('OpenCan') and env.Detect('OpenCanDbc'):
+        return
+
+    env.AddMethod(OpenCan, 'OpenCan')
+    env.AddMethod(OpenCanDbc, 'OpenCanDbc')
+
+
+def exists(env):
+    return env.Detect('OpenCan') and env.Detect('OpenCanDbc')